Chaeles b



l (N0 Model.)

0. E. TIBBLBS.

JOURNAL BEARING.

No. 828,088. Patented oct. 18, 1885.

UNITED STATES PATENT OFFICE.

CHARLES E. TIBBLES, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE TIBBLESMANUFACTURING COMPANY, OF SAME PLACE.

JOURNAL-BEARING.

SPECIFICATION forming part of Letters Patent No. 328,088, dated October13,1885.

Application filed March 12, 1885. Serial No. 158,571. (No model.)

To all whom t may concern.-

Beit known that I, CHARLEs E. TIBBLEs, of Chicago, in the county of Cookand State of Illinois, have invented a new and Improved Journal-Bearing;and I hereby declare the following to be a full, clear, and exactdescription of the same, reference being had to the accompanyingdrawings, making a part of this specification, in which- 1o Figure 1 isa bottom plan view of my invention applied to a sewing-machineshuttlelever. Fig. 2 is a vertical sectional view of the same. Fig. 3 isa plan view on the end opposite to that shown in Fig. 1. Fig. 4 is I 5 avertical sectional view of the conical sleeve. Fig. 4f is a plan view ofthe conical sleeve. Fig. 5 is a side elevation of the conical sleeve.Fig. 5 is a cross-sectional view on Fig-5, line m x. Fig. 6 is anelevation of the spindle or journal. Fig. 6 is a cross-sectional View online y y of Fig. 6.

The object of my invention is to provide a journal-bearing wherein thelost motion due to the wearing away of the surfaces can be taken up anda true bearing maintained.

My invention consists of a tapering bearing and a journal in combinationwith an intervening sleeve having its exterior surface tapering in twodirections, as will hereinafter 3o be fully described, and specificallypointed out in the claims.

In order that those skilled in the art may make and use my invention, Iwill proceed to describe the manner in which I have carried 3 5 it out.

In the said drawings, A is a shaft or spindle. B is the bearing or boxhaving its interior tapered, as shown at c. Between the journal and thebearing is inserted a sleeve,

4o C, having its interior surface conforming to the shape ofthe journal,and its exterior surface tapering decreasingly from b to d, to conformto the taper of the interior of the bearing B. The tapering sleeve issecured to the journal by means of a set-screw, e, which passes througha tapped hole, f, and into a slot, g, in the journal; or the slot may beomitted, if desired, and the set-screw be made to abut against thesurface of the shaft. So far 5o as described, this construction enablesme to advance the tapering sleeve into the tapering bearing tocompensate for the wear which occurs only between the tapering surfaces.If the sleeve, from b to its larger end, were a true cylinder, the wearupon it would be certain to create a shoulder or jog along the line ofthe edge of the bearing. Such a shoulder would destroy the efficiency ofthe sleeve, for the reason that it would make an irregular bearing whenthe tapering sleeve is advanced. 6o To avoid this difficulty, I taperthe sleeve from b to its larger end in a less degree than the taper ofthe bearing-surface.

In order to successfully advance the tapering sleeve into the taperingbearing, there must be no obstruction to advance of the small end t',-otherwise the abutting of the smaller end against any obstacle wouldrequire said end to wear away with sufficient rapidity to allow thesleeve to be advanced. 7o This would not occur; and to provide againstsuch an obstacle to practical operation, I either out away a portion ofthe bearing, as seen at t, to form a chamber, into which the taperingsleeve passes as it is advanced, or allow the sleeve to project entirelythrough the bearing, so no obstruction is offered to the advance of saidsleeve.

The chamber formed by cutting away the bearing, as shown att, I use asan oil-recepta- 8o cle, and provide the outer surface of the taperingsleeve with grooves n u, opening into the oil-receptacle, to conduct theoil between the wearing-surfaces.

The set-screw enables me to change the` relation of the sleeve aroundthe shaft at any time, if it is discovered that the bearingsurfaces arewearing unevenly.

Having thus described myinvention, what I claim as new, and desire tosecure by Letters 9c Patent, is-

1. The bearing B, having a tapered interior, and the shaft A, incombination with the intermediate sleeve, C, having its exterior surfacetapering in two directions, substantially as set forth.

2. A shaft, A, and a tapering sleeve, C, in combination with an openbearing, B, substantially as described.

CHARLES E. TIBBLES.

Vitnesses:

FRANK D. ELLswoRTH, W. E. STEARNs.

